@echo off
Setlocal Enabledelayedexpansion

:: wait to replace
set "str=jlcsky"

for /f "delims=" %%i in ('dir /b *.*') do (
    if exist %%i\ (
        cd  %%i\
        for /f "delims=" %%i in ('dir /b *.*') do (
            set "var=%%i" & ren "%%i" "!var:%str%=air001_!"
            echo "rename %%i"
        )
        cd ..
    )
)

pause